First rule of any copyright question is "Ask a lawyer"
I am not a lawyer, let alone your lawyer.
Parody is covered under fair use, money doesn't come into it, the idea that it matters at all in the question of "is this fair use?" is internet lies.
Even if it wasn't an explicit parody:
Audio sampling is almost certainly fine, because remixing audio is pretty permissive, the screenshot might not be?
Also, software license agreements to do with games tend to have a big old "EFF NO, DON'T DO THAT" clause for reproduction using the software
EDIT: I am not a lawyer and as such I may have said something inaccurate RE Audio sampling.
Turns out there are separate licenses for sampling for remixes of music tracks.
So yeah, on the whole: don't try to skirt copyright.